CURLOPT_USERAGENT(3) Library Functions Manual CURLOPT_USERAGENT(3)
NAME
CURLOPT_USERAGENT - HTTP user-agent header
SYNOPSIS
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_USERAGENT, char *ua);
DESCRIPTION
Pass a pointer to a null-terminated string as parameter. It is used to
set the User-Agent: header field in the HTTP request sent to the remote
server. You can also set any custom header with CURLOPT_HTTPHEADER(3).
The application does not have to keep the string around after setting
this option.
Using this option multiple times makes the last set string override the
previous ones. Set it to NULL to disable its use again.
DEFAULT
NULL, no User-Agent: header is used.
PROTOCOLS
This functionality affects http only
EXAMPLE
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
curl_easy_setopt(curl, CURLOPT_USERAGENT, "Dark Secret Ninja/1.0");
curl_easy_perform(curl);
}
}
AVAILABILITY
Added in curl 7.1
RETURN VALUE
curl_easy_setopt(3) returns a CURLcode indicating success or error.
CURLE_OK (0) means everything was OK, non-zero means an error occurred,
see libcurl-errors(3).
SEE ALSO
CURLOPT_CUSTOMREQUEST(3), CURLOPT_HTTPHEADER(3), CURLOPT_REFERER(3),
CURLOPT_REQUEST_TARGET(3)
libcurl 2025-02-08 CURLOPT_USERAGENT(3)
curl 8.12.0 - Generated Wed Feb 19 12:50:27 CST 2025